Final answer:
Anthropology, particularly the subfield of cultural anthropology, is the field focused on the comparison of cultures to determine their similarities and differences. The four main approaches in anthropology include biological anthropology, archaeology, cultural anthropology, and linguistic anthropology.
Step-by-step explanation:
The field interested in cultural comparison, or looking for what is similar and different between cultures, is anthropology. Specifically, this falls under the subfield of cultural anthropology, which is devoted to studying culture and people's beliefs, practices, and social organization. Within anthropology, there are four main approaches: biological anthropology, archaeology, cultural anthropology, and linguistic anthropology. These approaches collectively help us understand human societies, their evolution, and their diverse cultural practices. Cultural comparison is a vital part of anthropology, providing invaluable insights into the similarities and differences between various cultural groups, contributing to our understanding of social inequalities, and illuminating migration patterns of peoples across the globe.